This is a note to let you know that I've just added the patch titled
i40e: avoid null pointer dereference
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
i40e-avoid-null-pointer-dereference.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From cd956722167ba4fdba9c1ce3eed251b04ea2e10f Mon Sep 17 00:00:00 2001
From: Heinrich Schuchardt <xypron.glpk@xxxxxx>
Date: Tue, 17 May 2016 22:41:33 +0200
Subject: i40e: avoid null pointer dereference
From: Heinrich Schuchardt <xypron.glpk@xxxxxx>
commit cd956722167ba4fdba9c1ce3eed251b04ea2e10f upstream.
In function i40e_debug_aq parameter desc is assumed to be
possibly NULL. Do not dereference it before checking the
value.
Fixes: f905dd62be88 ("i40e/i40evf: add max buf len to aq debug print helper")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@xxxxxx>
Tested-by: Andrew Bowers <andrewx.bowers@xxxxxxxxx>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/intel/i40e/i40e_common.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/net/ethernet/intel/i40e/i40e_common.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_common.c
@@ -302,13 +302,15 @@ void i40e_debug_aq(struct i40e_hw *hw, e
void *buffer, u16 buf_len)
{
struct i40e_aq_desc *aq_desc = (struct i40e_aq_desc *)desc;
- u16 len = le16_to_cpu(aq_desc->datalen);
+ u16 len;
u8 *buf = (u8 *)buffer;
u16 i = 0;
if ((!(mask & hw->debug_mask)) || (desc == NULL))
return;
+ len = le16_to_cpu(aq_desc->datalen);
+
i40e_debug(hw, mask,
"AQ CMD: opcode 0x%04X, flags 0x%04X, datalen 0x%04X, retval 0x%04X\n",
le16_to_cpu(aq_desc->opcode),
Patches currently in stable-queue which might be from xypron.glpk@xxxxxx are
queue-4.4/i40e-avoid-null-pointer-dereference.patch
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